Swage shaper



Sept. 27, 1960 o. E. MOORE 2,953,943 I SWAGE SHAPER Filed Oct. 14, 1958 v S'Sheets-Sheet 1 Otis E. Mobre /5 1NVENTOR= 23 102 BY M I I8 '26 2, f

- 7 Sept. 27, 1960 o, MOORE 2,953,948

SWAGE SHAPER Filed Oct. 14, 1958 i 3 Sheets-Sheet 2 0M9 E. MOO/'8 ZNVENTOR.

BY WWW p 1960 o. E. MOORE 2,953,948

. SWAGE SHA-PER Filed Oct. 14, 1958 Y 3 Sheets-Sheet 3 0/11; E. Moore INVENTOR.

wr/ h 29% the right angularly disposed passages 66 and 68 depending on the setting of the valve core. The valve outlet ports 89 and 90 have air conductors 91 and 92 attached to them, and these extend to the ports 93 and 94 (Figure 4) of the double acting pneumatic cylinder 32 so as to apply air under pressure alternately to, the faces of piston 42 and thereby cause the piston rod 44 to be reciprocated through packing gland 95 in cylinder head 48.

There are two die holders and two dies in the swage shaper. Die holders 100 and 102 are identical and the same holds true of dies 104. Typical die holder (Figure ll) is made of a bar having a bore 106 near one end and a half-round surface 108 near the opposite end. Slot 110 extends through the die holder in order. to receive the die retention bolt 112 and washer 114. Die 104 is conventional in its function and configuration, and is held to the die holder 100 by retention bolt 112. Pin 116 is secured to holder 100 and it enters a small slot in a part of frame 12 (Figure 9) and fits between a pair of springs or adjacent coils of a single spring 118 that is captive in bore 120 that registers with the small slot through which pin 116 is passed. Spring 118 functions as a return spring for the die holder 100 when the die holder and die is being oscillated in its shaping function.

As shown in Figure 7 the die holders and dies are spaced slightly from each other to form a throat 126 within which to accommodate the teeth of blade 30. The throat is in axial alignment with the space between plates 26 and 28. In addition there is a tooth stop 128 located in throat 126 and adapted to abut the teeth of the saw so that each tooth is swage shaped with uniformity. Tooth stop 128 has an upper part 130 (Figure 2) that is held to the top surface of frame plate 14 by a bolt 132 passing through a slot whereby the location of the stop 128 in throat 126 may be altered. However, once adjusted it remains in place until the particular blade being shaped has been completed.

Reference is now made to Figure 9 to observe how the die holders are mounted. One end of typical holder 100 has a pivot 138 extending through bore 106 and attached to a part of the frame 12. The opposite end of the holder 100 is disposed on the surface of a supporting bracket 139 which is secured to frame 12. Therefore holder 100 is capable of being oscillated back and forth with the longitudinal axis of pin 38 establishing the axis of oscillation of holder 100. These movements, though, are yieldingly opposed by spring 118. An important feature of the invention is found in the means for so oscillating the die holders. These means consist of a pair of curved levers 142 and 144 whose adjacent ends are attached to adjustable cross head 146 and whose outer ends have split clamps 148 and .150 secured to collars 152 and 154 on eccentric shafts 156 and 158. The eccentric shafts have eccentrics 160 and 162 between their ends, and bearings 164 and 166 on opposite sides of eccentric 160; and bearings 168 and 170 on opposite sides of eccentric 162. Bearings 164 and 166 are held in aligned openings in the two sides 22 and 23 of fork 18, and bearings 168 and 170 are held in aligned openings in sides 21 and 20 of fork 16. The collars 152 and 154 may be held in place on the extending upper ends of shafts 156 and 158 by any suitable means, for instance by setscrews or by having the collars and shafts made with square openings and cross-sections respectively. In any case, the levers 144 and 142 cause the eccentric shafts to be oscillated in response to reciprocation of piston rod 44. Cross head 146 is made of a split sleeve 178 threaded to a selected place on piston rod 44 and clamped in place by a bolt. A pair of links 180 and 182 are pivoted to the cross head 178 and to the inner adjacent ends of the levers 144 and 142 thereby establishing a drive connection between the piston rod 44 and the levers 142 and 144. I

Collars 188 and 190 for the eccentrics 160 and 162 are disposed on bearings 192 and 194 located on these eccentrics 160 and .162. Two push rods 196 and 198 are welded or otherwise fastened to collars 188 and 190, and they extend through passages 200 and 202 in the confronting sides of forks 16 and 18. The confronting ends of the push rods 196 and 198 are contoured hollow to engage the half-round surfaces 108 of the die holders and 102. It is now evident that oscillation of cocentric shafts 156 and 158 by levers 142 and 144 will cause the push rods 196 and 198 to oscillate the die holders 100 and 102. This accomplishes the saw tooth swage shaping operation.

Adjustable stop 128 is contacted by an edge of the saw teeth and this establishes the correct position of the shaper along the length of the saw. The correct position of the saw and shaper with reference to a transverse axis is established by bolts 240 and 242 which are attached to the front part of the guide plates 28 and 26. These bolts are adjustable and are used for contacting the sides of the saw. With this swage shaper tooth shaping may be accomplished easier, with greater accuracy and much more rapidly than any other known shaper. Further, it is explicitly pointed out that the pneumatic cylinder is a short stroke cylinder which, through the action of the pair of levers and eccentrics on eccentric shafts, furnishes adequate operational motion and power for the die holders. The shortness of stroke is an important factor because the swage shaper is manually handled and therefore, with a short stroke, the length of the cylinder and piston may be made short thereby reducing the bulk of the shaper.

The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the invention as claimed.

What is claimed as new is as follows:

1. A tooth swage shaper for shaping the cutting teeth of a saw, said shaper comprising a frame, a cylinder attached to said frame and having a piston rod, a pair of shafts mounted in said frame and having eccentrics,

collars on said eccentrics, push rods fixed to said collars,

.to swage a saw tooth located in the space between said die holders, and means drivingly connecting said piston rod to said levers for oscillating said levers as said piston rod is reciprocated.

.2. Atooth swage shaper for shaping the cutting teeth of a saw, said shaper comprising a frame, a cylinder attached to said frame and having a piston rod, a pair of shafts mounted in said frame and having eccentrics, collars on said eccentrics, push rods fixed to said collars, spaced die holders pivoted to said frame and contacted by said push rods so that said holders are moved toward each other in response to rotation of said eccentric shafts to swage a saw tooth located in the space between said die holders, means drivingly connecting said piston rod to said levers for oscillating said levers as said piston rod is reciprocated, said pneumatic cylinder being double acting, and a valve having air conductors connected with said cylinder to apply pressure to said cylinder and reciprocatesaid piston rod.

3. The tooth swage shaper of claim 2 wherein said die holders are each pivoted at one end and have bearing surfaces near their opposite ends, and said push rods having ends in contact with said bearing surfaces.

4. in a tooth swage shaper for a band saw, the combination of a frame having a pair of spaced forks whose sides have aligned openings, an eccentrtic shaft mounted in the openings in each of said forks, an eccentric driven push rod and collar operatively connected with each eccentric shaft, a pair of levers connected to each shaft, a double acting pneumatic cylinder secured to said frame and having a piston rod, means coupling said levers to said piston rod for oscillating said levers and thereby oscillating said eccentrtic shafts and push rods, a pair of die holders mounted on said frame and having a throat forming space therebetween to receive the teeth of the saw, dies carried by said die holders, and said push rods contacting said die holders to move said dies into said throat and toward each other in response to actuation of said levers.

5. In a tooth swage shaper for a saw, the combination of a frame having a pair of spaced forks whose sides have aligned openings, an eccentric shaft mounted in the openings in each of said forks, an eccentric driven push rod and collar operatively connected with each eccentric shaft, a pair of levers connected to each shaft, a double acting pneumatic cylinder secured to said frame and having a piston rod, means coupling said levers to said piston rod for oscillating said levers and thereby oscillating said eccentric shafts and push rods, a pair of die holders mounted on said frame and having a throat forming space therebetween to receive the teeth of the saw, dies carried by said die holders, said push rods contacting said die holders to move said dies into said throat and toward each other in response to actuation of said levers, and a tooth stop adjustably secured to said frame and located in said throat to contact the saw teeth and establish a similar shaping position for each tooth of the saw blade.

6. In a tooth swage shaper for a saw, the combination of a frame having a pair of spaced forks whose sides have aligned openings, an eccentric shaft mounted in the openings in each of said forks, an eccentric driven push rod and collar operatively connected with each eccentric shaft, a pair of levers connected to said shaft, a double acting pneumatic cylinder secured to said frame and having a piston rod, means coupling said levers to said piston rod for oscillating said levers and thereby oscillating said eccentric shafts and push rods, a pair of die holders mounted on said frame and having a throat forming space therebetween to receive the teeth of the saw, dies carried by said die holders, said push rods contacting said die holders to move said dies into said throat and toward each other in response to actuation of said levers, piston stops for said piston, and at least one of said stops being adjustable and thereby providing means to alter the stroke of the piston.

7. In a swage shaper for a saw, the combination of a frame, a pair of die holders, means at one end of each die holder pivotally mounting the die holder on said frame, said die holders having a saw tooth throat therebetween, a cylinder having a piston and secured to said frame, a pair of levers, means including a cross head on the piston rod of said cylinder for oscillating said levers in unison, means carried by said frame and connected with said levers for moving said die holders inwardly of said throat and toward each other in response to reciprocation of said piston rod, and yielding means reacting on said frame for opposing the movement of said die holders.

8. In a swage shaper for a saw, the combination of a frame, a pair of die holders, means at one end of each die holder pivotally mounting the die holder on said frame, said die holders having a saw tooth throat therebetween, a cylinder having a piston and secured to said frame, a pair of levers, means connected to said piston rod for oscillating said levers in unison, means carried by said frame and connected with said levers for moving said die holders inwardly of said throat and toward each other in response to reciprocation of said piston rod, and yielding means opposing the movement of said die holders, said die holders moving means including a parallel pair of shafts having eccentrtics, collars on said ecsaid collars and extendthe inner ends of centrics, and push rods fixed to ing toward said throat, means engaging said push rods with said die holders.

9. In a swage shaper for a saw, the combination of a frame, a pair of die holders, means at one end of each die holder pivotally mounting the die holder on said frame, said die holders having a saw tooth throat therebetween, a cylinder having a piston and secured to said frame, a pair of levers, means connected to said piston for oscillating said levers in unison, means carried by said frame and connected with said levers for moving said die holders inwardly of said throat and toward each other in response to reciprocation of said piston rod, yielding means opposing the movement of said die holders, said die holders moving means including a parallel pair of shafts having eccentrics, collars on said eccentrics, push rods fixed to said collars and extending toward said throat, means engaging the inner ends of said push rods with said die holders and including raised surfaces on said die holders, and contoured surfaces at the inner ends of said push rods and in engagement with said raised surfaces of said die holders.

10. In a swage shaper for a saw, the combination of a frame, a pair of die holders, means at one end of each die holder pivotally mounting the die holder on said frame, said die holders having a saw tooth throat therebetween, a cylinder having a piston and secured to said frame, a pair of levers, means including a cross head on the piston rod of said cylinder for oscillating said levers in unison, means carried by said frame and connected with said levers for moving said die holders inwardly of said throat and toward each other in response to reciprocation of said piston rod, yielding means reacting on said frame for opposing the movement of said die holders, a tooth stop projecting into said throat, and means adjustably securing said tooth stop to said frame.

11. In a swage shaper for a saw, the combination of a frame, a pair of die holders, means at one end of each die holder pivotally mounting the die holder on said frame, said die holders having a saw tooth throat therebetween, a cylinder having a piston and secured to said frame, a pair of levers, means including a cross head on the piston rod of said cylinder for oscillating said levers in unison, means carried by said frame and connected with said levers for moving said die holders inwardly of said throat and toward each other in response to reciprocation of said piston rod, yielding means reacting on said frame for opposing the movement of said die holders, adjustable means carried by said frame and on opposite sides of said throat for contacting the sides of the saw to center the swage shaper on the saw, and an adjustable tooth stop carried by said frame and having a part projecting into said throat.

12. The swage shaper of claim 7 wherein said double acting cylinder is pneumatically operated, and a valve carried by said frame and operatively connected with said pneumatic cylinder to actuate the piston thereof.

References Cited in the file of this patent 

